# Eagglew 12000mAh DCB206 Replacement for Dewalt

- Manufacturer: Eagglew
- Tier: F
- Price: $25.00
- Stated capacity: 12 Ah
- Amazon listing: https://www.amazon.com/dp/B0FM866NL4?tag=lithiumsteppe-20
- Battery page: https://www.lithiumsteppe.com/battery/eagglew_12ah

## Summary

Decent performance across the board, but dangerous behavior and unknown cell origin make this a no-go.

## Ratings

- **Honesty**: 0.5/5 — Actual capacity is 3.2 Ah, vs advertised 12 Ah. Complete lie.
- **Durability**: 2.8/5 (teardown 3.5/5, cycling 2.2/5) — Decent tool contacts and otherwise solid electrical and mechanical construction.
  - Teardown notes: Decent tool contacts and otherwise solid electrical and mechanical construction.
- **Capacity**: 2/5 — 3.2 Ah is not good.
- **Power**: 2/5 — Middle-of-the-tier-list performance; but a cell exploded under normal operation.
- **Safety**: 1/5 — A cell vented (a minor explosion) during the performance test, which should be within the "operation as usual" envelope.

Scoring rules: https://www.lithiumsteppe.com/methodology

## Testing statistics

- Stated capacity: 12 Ah (216 Wh @ 18 V)
- Measured capacity: 3.2 Ah (57.7 Wh @ 18 V)
- Pack internal resistance: 76.5 mOhm
- High-power cycles survived: 8
- Peak sustained power: 865 W
- Energy delivered (failure test): 29.1 Wh

## Cell notes

No credible manufacturing data found. Potentially part of RJLD / Jiangsu Runjin Lithium Battery.

## Test data

Test procedures: https://www.lithiumsteppe.com/test-procedures

- **Pack Internal Resistance Test** (rinternal): Pack Resistance: 76.5 mOhm (average value of pack resistance between 17.5 and 18.5 V)
  - CSV: [rinternal.csv](tests/rinternal.csv)
  - Bench source file: eagglew_12ah/rinternal_eagglew_12ah_260521-12-58-13_0.csv
- **Capacity Test** (capacity): Capacity: 57.7 Wh (27% of stated 12 Ah @ 18V Nominal)
  - CSV: [capacity.csv](tests/capacity.csv)
  - Bench source file: eagglew_12ah/capacity_eagglew_12ah_260521-20-44-55_0.csv
- **Cycling Test** (performance): High-power cycles survived: 8. Failure mode: Battery thermistor reached cutoff
  - CSV: [performance.csv](tests/performance.csv)
  - Bench source file: eagglew_12ah/performance_eagglew_12ah_260528-10-08-22_0.csv
- **Failure Test** (failure): Energy discharged: 29.1 Wh, Peak power: 865 W
  - CSV: [failure.csv](tests/failure.csv)
  - Bench source file: eagglew_12ah/failure_eagglew_12ah_260528-11-10-42_0.csv

### CSV format

1 Hz samples. Lines starting with `#` are run metadata (test profile, battery profile, instrument identity, Arduino DAQ channel labels); the first non-`#` line is the column header. Columns vary by run date — Arduino DAQ columns (tc/v/r_ntc/fault) appear on runs logged since 2026-05-11.

- `ts_unix / ts_iso` — sample timestamp (Unix seconds / ISO-8601 local time)
- `elapsed_s` — seconds since test start
- `voltage_v` — pack voltage, V (4-wire remote sense)
- `current_a` — discharge current, A
- `active_power_w` — discharge power, W
- `discharged_ah / discharged_wh` — integrated charge / energy removed
- `phase / target / cycle` — load-profile phase name, setpoint, loop count
- `tc1_C..tc4_C` — Type-K thermocouple temperatures, Celsius (nan = channel absent, disabled, or faulted)
- `v0_V` — DeWalt C3 cell-tap voltage, V
- `v1_V` — DeWalt TH thermistor-pin voltage, V
- `r_ntc_ohms` — pack NTC thermistor resistance, ohms, derived per-tick from v1_V and pack voltage (DeWalt tool thermal cutoff reference: 2140 ohms)
- `fault1..fault4` — MAX31856 status byte per thermocouple, hex (00 = healthy)

## Photos

- Headline photo: photos/headline.png
- Teardown 1: photos/teardown_1.jpg — Some pack deformation after performance and failure tests
- Teardown 2: photos/teardown_2.jpg — Repeated failure mode in the same corner of the pack: melting around the same electrical connection
- Teardown 3: photos/teardown_3.jpg — Internals of repeated failure mode
- Teardown 4: photos/teardown_4.jpg — A common failure mode, busbars / PCB solder joint melting and failing
- Teardown 5: photos/teardown_5.jpg
- Teardown 6: photos/teardown_6.jpg — Flimsy tool electrodes are prone to bending and failing
- Teardown 7: photos/teardown_7.jpg — 1 ruptured cell after failure test (somewhat expected). Cell label: RJLD 18650 AE 3.7V 26B011

## Files in this dataset

- `README.md` — this file
- `site.json` — the published data record for this battery (machine-readable)
- `tests/{rinternal,capacity,performance,failure}.csv` — raw bench CSVs (see CSV format above)
- `photos/` — headline + teardown photos (captions above)
- `test_procedures.md` — the four bench tests
- `ranking_methodology.md` — how ratings are scored

---

Source: Lithium Steppe (https://www.lithiumsteppe.com) — We test DeWalt-compatible power tool batteries on Amazon to guide your purchasing decisions.
Generated: 2026-07-16T19:29:36.631Z (site commit a353b4a)
Contact: https://www.lithiumsteppe.com/contact
